Window assembly



Nov. 10, 1942. H. A. KAUFMANN wnwow ASSEMBLY Filed Jan. 22, 1941 2 Sheets-Sheet 2 HARRY A. KAU FMAN N INVENTOR Patent'ecl Nov. 10, 1942 UNITED STATES PATENT OFFICE wnmow nssmmnr Harn; Ksuhnsml, Grosse Pointe Park, Mich. !Wplicstion Janmu7y 22, 1941, Serlal Nol 375,405

70laim's.

'I'hls invention relates to window constructlon und. particularly to metal Irame storm windows o! the double hunz type. For iu11 expla.natlon und elaims relating to certain incldental disclosure herein unclaimed reierence is invited to my application Serial N0. 322,793, now Patent N0. 2,291,726.

Although the use 01' storm windows iniwarious iorms has lang been common, there have beten in the conventional und known types o! storm windows many disadvantages. 'Ihe wooden Irame storm windows were ciumsy tb make, prohibitive in both expense und space occupied to malte as double hung windows, they required installation and removal Kram the outside o1! the buildin& they usually fltted only imperifectly at best a.nd in general thelr value was usually very deiicately balanced against the expense and nuisance involved in using them. The known iorms 01 meta.l irame storm windows solve some 01 the above difllculties, particularly those relating to spa.ce occupied, but a.re usually prohibitively expensive im the average user and even in the best installations they oiten rattle. Hence it was desired to create a storm winciow which was inexpensive to manufacture und install, easy to remove and reinstall und capable o! receiving such operations irom an operator located inside o! the building, non-rattling, tightly fltted excepting tor only a. nwessary minimum ot brea.ther spaceatgd erspable 01 belng 01 the double hung type ocbupying only asmall space and presxnting a neat appearmee an both the inside and outside thereot. =These desirable attributes have been secured by thewlthin disclosecl window.

Accordingly, a primary object o! my invention in to provide a. storm window 01 the double hung type which is lnexpensive to manuiacture, install; remove and reinstal l. 1

A turther object 01 my invention is to provide a storm window construction which ca.n be readily adapted to wlndows 01 many shapes und slzes.

A turther object o! xny invention ls to provide a. storm wlndow which is neat in appearance from both the inside and outside 01 which is easy to opera.te from open to closed positions und vice versa.

A iurther objet o! my lnvention 1s to provide a stbrm window 01 the double hunz type having the above desir'able attributes can be readily and ea.slly installed and removed by' an operator lo :ated inside of the buildlng and herein auch operaltlon may be efiected without the .ot screws. catches slides or wherein the windows 0 A further object 01 my invention is to privde a storm window ha.ving the above named qualltles A Iurther object 01 my invention is to provlde a.

storm window having the above named qualities which would occupy on1y a minimum 01 space.

A further object 013 my invention is to provide a storm window having the above na.xned qualities which would be non-rattling.

These und various other desira.ble objectives and results will be apparent to those skilled in the a.rt upon an examination o! the iollowing disclosure taken with reierence to the drawings.

In the drawings:

Figure 1 represents a. broken view 01 a. pa.rt o! my window es Seen irom the outside 01 the buildins.

Figure 2 represents a section 2-2 of Fix. 1.

Figure 3 represents a. section taken on the line 3-3 o! Fig. 1.

Figure 4 represents a sectlon taken on the 1ine 4-4 015 Fix. 1.

Figure 5 represents a. section taken on the 1ine 5-5 o! Fig. i.

Figure 6 represents a sectlon taken on the line 66 01 Flz. 1.

Figure 7 represents a. broken perspective view 01 a. lower comer 01 the installation es Seen -Irom the outside oi.the buiidins but havin8 the window sashes removed in order bettet to show the mountings thereior.

Flgure 8 represents a broken perspective view 015 a side 01 the window et the meetinz rails thereof, showing the sashes a.t that point and the manner 015 their arrangement und mounting but showing seid sa.shes with the glazing removed there- Irom in order better to show the manner 01 mounting.

Figure 9 shows a. seetion 01 the sash rail only (and glazing) taken a.t 9-9 01 Fig. 1.

In the exampie o! my invention chosen ior distetken on the 1ine the building und blosure, and Illustration herein, there is shown a window adapted for residentigl use mounted upon a. wooclen fra1ne. However, lt wil l .be apparent that the concept her eindisclosed isx1'ot a.t all 11mited to the example chosen, but that such example is usedsol'ely by way 02 Illustration and the invention is ad aptable to ma.ny types o! windows und uses, und that varia.tions which will be incldent to such variations in use will all be within the scope cf my inventien es more precisely deflned'lxi the hereinaiter appended claims.

'Ihe window herein disclosed s.nd described :ls intended to be located Within the ordlnary wooden winclow frame of a house, IIice building or a'partmen't, and outwardly of the blind stop thereon. All o1 its parts are sufficiently small so that it fits neatly Within this recess. II; is o1 the double hung type in order that the weil known advantages cf draftless ventilation comm0n to such windows may be obtained quickly and eesily and without intzurring the awkward appea.rance found when the lower ends of single frame windows are pushed outwardly to secure ventila.tion.

Ref'erringnow to the drawings, the numeral I represents an upper sash of a double hung storm windovv, which said sash has rails Ia, I--b and I-c. (Of course, it will be understood 'thet for the sehe of simplicity in illustration the drawings slmw only one half of the window and that in al.i respects the other half 0f the window is identical with the half here shown.) These sash 1ails are all made in eny convenient menner, provided only Izlmt they are thin enough so that two cf them lying together, es at bhe meeting rails of the upper and lower sashes, do not occupy more space than is availalole between Ithe blind stop of the ordinary wooden window frame and the outer extremity cf seid fmme (Fig. I3). For this purpose I have founcl a rolled metallic sash rail of substantially W-shape I;o be satisfactory. Its crosssection is as appeers in the drawings, its corners are bonuled by the insertion of metal plates 2Il aI; seid comers ancl held by embossings IQ. 'I'he glass, is set into a strip fibrous material, which holds it tilghtly. 'Ihe details of this particulax construction are more fully illustrated and expleined in my epplieation fo1 Letters Patent, Serial N0. 322,793, now Patent N0. 2291726. However, so far es ehe particular invention herein disclosed is concer'ned, any form of sash rail which hes the i;ransverse thinness above specified, will be sati.sfactory.

In the form shown, the sash is provided With a periphere! recess 3 for the reception of a slicling guide member 5-a. II: Will, of course, 'be understood thai; while this construction ls bete selected for illustrative purpcases, iI, .Is by 110 means essentiel nor even necessarily preierred. A successful window may Ioe built wherein the guide meinber 8a is replaced by a U-shaped channel into Which the entire rail I-a fits bodily. 'I'his U-shaped guide acnually has (3ertain advantages in installation due 130 the greater ease of precise locating thereof, bei: either Werks weil. Thema are, lilzewise, man other available forms of guide and supporting strips amd many means of effecting their cooperacion with the sash rails, buI: Ehe form here hes proved satisfactory and is selectecl for illustrative purposes es mentioned above.

Numeral 2 indicates a lower sash having rails 2--a 2b and EI-c. II: is subjeci: to the same requirements and free 150 i;he same libertles es is the upper sash.

A guide and supporting strip II is pleced aus shown in Fig. 3 I0 guicle anal hold sash I by the insertion of its pon'zlen II- into-the recess 3 of sash rail Ioz. Member I represents a brickmold, frame member, 0x simiiar snd correspond' Ing member, depending upon the type cf building upon Which thewinclow is being installed. Strip II is afiixed Iso the winclow frame or brickmold "I by any convenient means, such as suitably spaced screws of which that shown at 8 is one. Strip is formed es a righi: angle as shown and preierably has a folded back portion on the leg a.

Stxip G3 extends the fu1l length of sash rail Ia and it: is set outward of the blind stop 9 a sufi3- cient distance I0 provicle clearance between itSeli anal saicl blind stop for the lower sash 2 and the resilient strip I I, hereinafterdescribed, which is associated with it.

011 I:he upper portion of the window (Fig. 2), sash rail Ic is received and held in weather sealed relationship by strip II], Whose construction is preferably identical with strip 6 and which is likewise held against frame or brickmold 1 by any convenient means, such as suitably spaced screws of which that shown at II is one. This strip runs the full length 0f sash rail I-c and may conveniently be mitered 1:0 fit a corresponding miter on the upper ends of strip 6 anti the counterpart of strip 6 on the other side of the window. Strip I O, of course, does not have the supporting e.ncl guiding functiom of strip 6, but it provides a weather seal between sesh rail Ic and the adjacent part of frame1. Strip I 0 is obviously placed I:he same distance outwardly of blind stop 9 as is strip I5.

Sash I is supported from falling by any canvenient means such as rod I2 (Fig. 1) having manipulating handle I2a, which rod is plax:ed within the recess 3 0f rail Ib and retained therein by pin I3. 'Ihis rod is readily slidable a.nd is adapted to slide into an appropriate open- Ing in. the frame I. This supporting means is preferably duplicated on the other side ot' the window, not shown.

Lower sash 2 (Figs. 1, 4 and 8) is located inwardly of upper sash I but likewise outwardly 0f I:he blind stop 9. II; rests tightly against strip M which may be made of any resilieni; material such as bronze, resilient aluminumor stainless steel. Strip I I has a, portion Ma which rests against frame l and is fastened thereto by any convnient means, such as screws; a, portion M--b Which rests tightly against the outward face 39 of blind stop 9; and a retutn bent portion I I-c which c0ntacts the inner face 68 of sash rail 2a anal exerts a light by definite pressure against iI: Strip III extends the full length of sash 2 and also somewhat above it as shown in Fie. 8 at ILI-d.

As indicated aloove, the outer face of rail ie of sash 2 contacizs ti1e iriner face of rail Ib of sash I. Sinne sash I is held by strip 5 in fixed position so far as inward or outwafd movemeni; With respect to I;he blind stop is concerned, the pressure of resilient strip M holds I;he meet- Ing rails Ib anal 2-c of thesashes together in ght weather sealing relationship.

In this way the upper end cf lower sash 2 is firmly helcl on. the inward side thereof by the strip Hi, which is backed by the blind. stop 9, ana on the outwarcl side thereof by the rails 0f upper sash I, laut seid lower sash 2 remains free i:o slide upwarcl anal downward. Strip I4 in addition to its pressure exerting and sealing Iunctions, provides s protection for the wood of frame 7 and blind stop 9 against scraping of sash 2 in its slicling up or down.

Adjacent to ths iawer end cf sald lower sash 2 there is located srip I5 (Figs. 5 and 1), Which is substantially similar to s'trips 6 and I0. II: is axed in any comenient manner, es by screwing, 1:0 frame I anal is spaced f rom blind stop 9 such a distance that when recess 3 of sash rail 2a 1's placed wer I5, said sash rail will press tightly a gains't resient strip I I anal deform the Same Co cause itto exert a light pressure against seid sash rail.

portion IE-a cf seid strip Obvlously th1s distance wlllvary accordlng to the transverse dlmenslon of sash ral1 2a but whexe the sa.ld rail ls about 01 an lnch in thlckness und strip II, at part Il-c thereof, In lts undeformed state extends outwardly ot the b1lnd stp about V, lnch. I have found lt sultable to place the center 1lne 01 portlon I5--a of strlp I5 about lnch from the outward surface I9 ot blind stop 9. Strlp I5 coxnmences at the extreme lower 1lmit o! sa.sh 2 an the top surtace 01 window ledge I6 und extends upward for a distance o1 about one-elghth of the total 1ength 01 wer sash 2 (Fig. 7). OI course, strlps I4 and I5 are dupllcated on the left-hand slde of the window whlch ls not shown in the drawlngs.

I have further found. lt advantageous although not essential. to emboss a. ralsed portlon, or plmple, in the posltlon shown at I8 (Flgs. 1, 8 und 9), whlch ls on sash ra.ll 2--a and 011 the Iace thereof adjacent sash rall I-b 01 sash I and located any dlstance away from the lnner. or lower llne 2--d 02 sash rall 2-c extended, whlch dlstance Is 1ess than the transverse dimenslon 01 the sash rall I-b. Thls plmple I8 serves severa1 purposes. When sash I slldes upward; as hereinafter more fu1ly descrlbed, the

said plmple causes sashes I und, 2 to separate sllghtly to locallze the scarring caused by s1ldlng into the reglon o1 thls plmple only, und. thus to'prevent the unslghtly appearance occurring when the entlre opposed surfaces 01 the sash ra.ils scrupe and' max each other. More important, however, lt has been found that the lndlvldual sash ral1s sometlmes de not ahnt precisely at the corners of the sashes, and hence when the lower sash has been ralsed and ls agaln belng lowered lnto lts closed posltlon, the edge 2d sometlmes catches 011 the edge Id and obstructs proper closlng. Thls plmple I8 keeps the sashes far enough apart to prevent this catchlng when the edges 2 d and ld of sald ralls 2- c and I-b are meetlng each other, but then permits sald ralls to come tlghtly together in weathersealing contact, as herelnafter detalled. as soon as sald edges 2-d am]. Id have passed each other.

Obvlously, thls plmple can be placed 011 a. corresponding or lnner face of the upper sash rall I-b as wel1 as upon the outer face of the 1ower sash as lllustrated und above descrlbed.

In lnstalllng the windows, which can be done from the inside of the bul1ding, lt ls necessary only to afllx strlps B, I0, I4 anal I5 in posltlons as shown and descrlbed. This is done in any convenlent manner, such as by the 'use 01 screws, and may obviously be done from the lnside ol the house. Then, with the operator still lnslde 01 the house. upper sash I is thrust outward of the blind stop by belng turned lengthways and a1: an angle to the horizontal in order to pass said blind stop and then lt ls turned upward and recess 3 01 ra.ll Ia (and lts counterpart on the other slde of the window) ls led onto guide portlon 6-a of strlp 5 (and lts counterpart on the other slde oi the wlndow) und then the sash ls pushed up wardly to the top, In whlch posltion portion- Ifl-a of strlp III will be fltted snug1y into recess 3 o1 rall I--c and-the fastenlng means, as rod I2, may be placed in locked posltlon. Upper sash I will then be flrmly held in posltlon anal be weather sealed on both lts sich: ralls and lts upper ral1.

Next lower sash 2 ls slmllarly turned 1engthways and at an angle to the horizontal so that the operator lnslde 015 the bulldlng can thrust lt strip I 5.

outwarly 3;aast iallnol stwp. When the entlre wlndow ls outwardly m. the blind stop lt is turnecl and lts upper ra.ll 2-c placed aga.lnst the reslllent strip I4 (and lts cmmterpart on the other slde of the wlndow) adjacent the bottom rail Ib 01 the upper sash (Flg. 8). With a llttle lnward pressure applied to said Iower sash 2, the portlon Il-c 01 strip I6 ls depressed and the upper ral1 2c of sash 2 ls permltted. to s1lde behlnd the lower rall I-b 02 sash I. The reslliency of strlp II, together wlth some natural reslllency in strlp 6 and the retalnlng plns I2, will permlt sash 2 to assume thls posltion and, further, to be pushed upwara until lts bottom rail 2-c clears the top 01 strlp I5, whereupon the bottom end of sash 2 Is then moved lnward untll recess 3 cf the slde rall 2-:a (and lts counterpart on the other side 01 the wlndow) ls In allgmnent wlth gulde or flange I5-a 0i? Sash 2 ls then moved downward into posltion, whereupon the meetln g ral1 2--c ls aligned wlth rai1 I-b and the same ls pressefil by resilient strlp I I lnto weather sealing contact wlth rall I5 (Fig. 8). Thus the upper end of sash 2 ls firmly retained between sas,h I und strlp I4, whlch 1atter ls backed by the b1lnd stop S, and the bottoxn end of said sa.sh 2 is retalned in posltlon and tlght1y agalnst strlp M by the actlon 0f strlp I5 (Fig. 5).

Obviously, both sashes can be removed by an operat or lnslde of the building by reversing the procedure outllned above.

It is apparent that sash 2 can be ralsed a short dlstance Ior the purpose of ventllation lf desired, at least for a dlstance equal to the length o! strlp I5. I f however, lt ls deslred t0 miss sash 2 more than that, lt can be pushed upwar lnto the recess dellned outwardly by the lipper sash, lnwardly by the blind stop and perlpherall:. by the wlndow frame or brlckmold 1 und may be adjusted In varlous posltlons thereln, and may be held in ralsed posltion b:v any convenlent fnrm of sash holding devlce (not shownl. Llkewisva Ior convenlence in handle, handles may be placed on the inward side 013 sash rail 2--b, laut since these are standard and may be supplled by zmy skilled mechanlc, the y' are not shown in t]ne drawings er described harel1n.

II; will be observed (Fig. 6) that the lower rail '2-Q) of sash 2 is spaced from the blind stop portion I1 of wlndow ledge I6 a dlstance equal t0 the space occupled by strlp II. Obvinusly, the1e mery be pla.ced between member I1 ancl rail 2b a strip similar to strlp II 11' lt ls desired to secure further weather sealing at thls pcnmt. 'I'here may o1 may not be used a strip 2I placed within the recess 3 of rall 2 -b, whlch, if used, may consist of many Wall known l'orms of stl'ibs made cf rubber or simllar materlal for provlding l'urtner weather seallng batween said rai1 2--b and leclge I8. However, lt nas been found that s0me slight leakage of alr ls desimble between tha outslcle and the space between the storm window anal the main wlndow in order t prevent steaming anal fogging of sald windows and that the leakage eflfected I: y omitting weatl1er strlpplng at i;l:iS'

point is suificient l'or this purpose without loslng any appreclable part of the beneflt uf the stumm windows. Hence, strlp 2I may be omltted if deslred.

.It Is, of course, apparent tha.t the wlndows: herein dlsclosed mlght be made w1'th many variatlons in slze anal in certaln construxctlonal de tails, many 0f whlch varlatlons might even be im provements hI.E:OV:TIT, but which will all come wiahin the' scope cf the invention as more fully du=afined by the hereinafter appended; claims.

Such variafizions mighi; be found in adaptaticns1 to fit brick or concrete walls instead of wood as might develop in apartment or factory application, installation of further sealing on the bot tom rai1 of the window as suggested above er re-= moval cf some herein illustrated as used (auch 2%:3' the strip m fitting into the top ra1l fl-c) use of screen within one o1 both of the sash frames zlnstear.l cf glass, or use cf thin wooden 01 plastlc Teils instea.d of metallic. Further, variatlans mlght be founC-. in the shape of strips 89, M, am! their manner of coopera/cion with ehe sash falls, in! here are many known forms of guide strips anal resilient strips which will eflect the purpose herein alesirecl, namely, guiding and supporting ancl weather sealing in tlfxe-case cf strips =il and i anti exer'mg pressure, weather sealing am]; protecting Ehe window flamme against 2vear in. lahe case cf strip Further variaisions miglz1i: be hal in logating spring contaci; means inside of Ehe hottom rail cf the upper sash.

Although this construbtion is prime.rily intenaledfor storm winclow. anti/x screens, lt ls olevious thas lt may also be advantageously wsed as ihr-z only window fo1 such construntinns as a summer cottage at a lenke.

All of such variations and oahers which may be suggesced, except where otherwise speciflcally limited, will come within the scope cf the invention as defined by the appenclecl claims.

L'Izwing ihus fully descfibed n1yinvention, what I c1aim as new is:

l. Sturm wlnrlow cnnstrucion \:Q a wunden window frame having a blind stop am? positioneol outwardly 0f the saicl blind stop con-- sisting of an upper sash having a, peripheml recess in the top anti side portions thereof; a lower sas:h having a peripheral recess in the sioles ishereml; br5th. sashes being together of a tlickness 221 a direction perpenclicular t0 the plane of seid Wim d0w lass than the disizance fmzn filme outwarcl surface of szzid blind 513019 to che eutermosfi; extena of tine said wimlow frame; a strip conn.n a right angular section anti afiixed; by one g n saicl right angle t0 'hf3 saicl windovv fxame at the =30p of the opening therein in position to permlt the other leg 110 1ie within the said peripheral recess in the' top 0f the upper sas'n; strips each. ccmtaining a, right angular section am! affixecl 3237 one leg of said right angle o tl1e saicl winclow franie at each of the sides cf the npening therein in position t0 permit the ai;her leg of each of saicl right angular sections 120 l1'e Wihin the periphera.l recess a1: the sicles cf said upper sash; releasable, means to hold said upper Sash againsc falling; said upper sash anal salcl strips being spaced away from said blind sto;n suciently to permit the sa.id lower sash. and the herelnafter mentioned strip cooperating therewith to fit between said upper sash and said blind ston; a pair of resilient strips l3ling against the outep most surface o1" saicl blind stop am}. affixed theret0 ai: an angle With th seid outermost surface o'f said blind stop to engage uncler pressure i.-he inner surface cf the lower sasn anal saicl strips extencling the full length of said lower sz.sh anal a short distance above same when same is in its closed position; anti 9 pair of strips containing aright angular section los? ted adjaceni: the lowermost end cf the lower sash, nach having 0ne leg of the righi: angular section affixed 120 i;he sld.e walls of ehe cpening 015 the winzlow 3:rzm1e anal same ncl cause them toexert a pressure against the immer surface of said lower sash, wheuby strips against 1:he looistom portlon of the seid upper sash anal ehe lower end cf the lower sas'n is held in weather sealing relatiqnship b3 i:he said resilient strips agalnst the said above nazned lower sash peripheral-recess-engaging strips 2. In window construction a. storm window a fixed to a window frame havinga blind stop and positiomd*outwardly cf the said blind stop 00mprising: An upper sash; a lower sash; both sashes togethez beim; of thickness to enablethern Iie ngainst the said blind stop' on the outwara side 'ahermaof without extending beyond thP window frame; strip means affixed to the w:adow frame a; the top of the opening thereof engaging the top rail of said lower sash to retain same in operatlve Position; a pair of strip means afiixed to the =a rindow frame one a.t each side of* the opening i7hereof engaging the respectlvely adjacent side mils 0f said upper sash to retain'same in operative position; releasable means t'o hold said sash againsi; falling; said sash and said strips being spaced from said blind stop as hereinafter speclfinal; a strip lying against. the outermost surface 01" the blind stop and against the adjacent portion cf ha window fr ame and having a resilient por litm thereof lying at an acute angle with the said ouiermost surface of sald blind stop, said strlp a=xtending 1;?1e .fu1l Eength of said lower sash and sligntly above he sarne when ehe same is in its nnrmai closed. p0sitlon; a strip affixed the Wind0W irame anal engaging thelower sash at the sldes thereo:f anal holding said lower sash tightly es; he resilieno portion of seid last-abovenamed stfl'p, said strip being 0f an extern; 0f lass tlmn onehalf zlm corrasponding extent of said E0wer sash; izhe upper end of saicl 10Wer sash anci saic1? strip which carries the resilient portion, sa.id st1 rip .l1aving "alle angle thereof partially deformed :rm arcis the blind sto, .lying snuglly between said blind stop and said upper sash, said upper sash anal associated members being the Sole means to hold said upper end 025 said lawer sash against sald resilieni; portions; whereby said upper sash h@l i in. weaizher sealed relationship by thes;rlps associat.ecl therewith i:he said window frame arm; the lower sasl1 is held in weahersealfing relationship against saicl strips with the resilient portion a1: its upper encl by said upper sasl1 sind. at its lower end by the above mentioned strips engaging th sides 01" ehe lower sash.

3. In window construction, means for mount fing a pair 0f sashes in a main windc-w frame havi.ng a blind stop therecn and positioned outwardly of the said blincl stop ;emprisingt An upper sash and a lower sash, each having means effecti ve for cooperation With a strip at each of the sides thereof; a pair of sbrlp mea ns mounted one upon each side of said'. i'rame and sliciably engaging nach respect ive sifi f said upper sash in a manner Eo retain samc'e against displacement perpendlcillar 120 said blirni stop; releasable means io support sa1d u.p sash against falling; said upper sash, its gu .lr-v strips and said pair of supporting releasable 2215 b eing spzvced from said blind stop as spea" balow; a resiliem strip afflxe:i at an angle i;he nuermost face 013 the blind stops on each sich: o! .the irs.me and arranged in ansage a.nd guide the l1mqr surface ot the slde rails o! the lower sa.sh; means associated with the side ralls 01 the lower sash near the lower end ther eoi w hold the sald lower end cf the lower sa.sh tightly aga.inst said resilient strlp s; sald lower sash resillent slightly deforxned pbsition fltting snugly betwe'en the bottom rai1 01 sald upper s88h und snid blind stop and the said associa.ted therewith blind stop sufiicient to aocomm'qdate saidloWer aash und r'esilient strip accordingly und to provide at its upper ehd meinst said resilient strip, whereby said upper und 1 als its upper end und saldstrips nearest adla.cent thereto in the sole means ior holding seid lower sash upper sashnnrl the xnemberw beim; spaced away irom said sash an upper s a sh; said lower sash beink posltioned adja.cent the said blind s top und seid upper sash positioned to locate the innen surface 01 its bottom portion a.gainst the uter-suxiace o! the upper portion of the lower sash; means slidab]: ensazing the lower sa.sh at itslower portion t.o hold t.he same agains t movement perpendicu- In: in the iace oifthe blind stop but permittingmovement parallel thereto und. sald meims being 01 extent lass than one halt 01 the corresponding extent: oi t.he ldwer 'sash: means alidably enxaging l.he sides 01 seid upper saslrto hold the same weinst movement perpendicular to the iace o! 'the blind.stop und in contact with the' lower sa.sh

lower sashes ma.y be both madily installed, removed und rel nstalled i'rom lieb tizhtly between seid upper sbop; releasable means to support sa.id unper sa.sl 1 against talling. a part 01 sald lower sa.sh a'nd resillent st rlp lying between a part o: aav.icl urm@r 1 sashnndsaid blind stur).

5. In window construction, means ior xnount in: a palr oi sashes in s. window iram'e ha.ving a und spa.ced awa.y irom seid blind stop a sashandsaidblind.

an bove specifled but permittlng sliding' movement parallel thereto; andmeans 1:0 hold seid upner sash against Ia.lling said upper sash being the aole means by which tbe sald upper end 01 tho lower sash is bald in position. on the outward sash having contactin: sections when said sash side thereoi; resilient means mounted an the seid blind stop und, bearinz aza.inst the sa.id lower sash an tbe inward slde thereof.

" 8. In window construction including a. pair 01 am in their closed positlon, means inopeiative when the window is closed und operativewhen the winclow is open ior-holdlng seid sa.sh spaced apa.;t comprlsing: a pair o: ra.ised portions on one sa.sli one such portion being qneach vertical slde of said sash, a.nd Dein: on the vertical surtace thereoi! nearest the othexsash' but loca.ted

" thereon out of the section ot seid one sash which sa.id resilient strip in its operatlng position to ls contacted by sald other sash when said sa.sh are in their closed position.

blind stop thereon und seid aashes positioned outwardly oi' said blind stop comprislng: A lower "I. In wlndow constx-uctlon including a pair 01 Tmash havingeontacting sections when seid sash a.re in their closed posltlon, means operative oniy i' when sald wlndow i.s open ior holdi1'xg seid mal: fispaced slightlY apart comprising: a pa.ir of raised portions on one sash located on the vertical surfa.ce thereot nearesi; thE othe r sash.

' HARRY A. 

